Dust cover



epL 9 1924.

w. L. DAVIS DUST COVER Filed June 2a. 1923 Patented Sept. 9, 1924.

unites srares PA TENT orrice. I

WILLIAM L. DAVIS, OF PETERSBURG, VIRGINIA.

Do's'r covnn.

Application filed June 28, 1923. Serial No. 648,376.

and useful Improvements in Dust Covers;

and I do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the ac companyingdrawings, forming part of this specification.

This invention relates to accessory devices for use with automobileengines for shielding the working parts from dust and grime.

The object of the present invention is to provide a dust cover for anautomobile bloc of the overhead valve type which may be secured in placeand which will shield the valve from dust, dirt, sand, and grime.

A further object of the present invention is the provision of a metaldust cover which may be securedon the engine bloc by attachment to theexhaust port without other connection with the engine. A still furtherobject is the provision of a dust cover in which provision is made forthe oiling of the various joints.

Since automobile hoods are not at all tight fitting at the sides and areentirely open at the front a great amount of dust and dirt blows overthe working parts of the engine and soon builds up. a deposit ofappreciable size. This is unavoidable as it is absolutely essential thatair be drawn in from the outside to cool the'motor. The presentinvention contemplates the provision of a metal casing covering theentire top of an engine bloc having overhead valves and covering theside of the bloc down to the lower chamber. The principal objection to adust cap of this nature is that it is awkward to remove and unless somemeans is provided for oiling the several joints through the casing orcanopy of the dust cover it is almost as easy to let the dust and dirtaccumulate and to remove it from time to time as to be bothered with theconstant removal of the cover.

The present invention contemplates the provision of a shutter in the topof the hood and movable a slight amount so as to uncover all of the oilholes when desired and at other times to close the hood entirely. Thereis no absolute necessity for closing the rear end of the dust coversince the draft is sufiiciently strong to prevent the accumulation ofdust through the rear end, but

I rather prefer to close'the dust cover entirely since therear flangeaids materially in stifiening the entire body of the dust cover. b I

' In the drawings,

Figure 1 is a perspective of my dustcover detached from the engine.

Fig. 2 is a vertical section through the engine with the cover in placeshowing particularly the method of attachment. 1

Fig. 3 is a top plan view." The invention is applicable for use with anyone of the various better class engines practically all of which, usethe overhead valves operated by rocker arms centrally pivoted on theengine bloc and the invention is shown in Fig. 2 in connection with suchan engine. The cover includes a large vertical member 10 hereinaftercalled the side of the cover this being perforated as. at 11 to matchthe opening in the exhaust port and at'12 to'receive bolts which securethe exhaust manifold flangev to the exhaust port flange of the bloc;Near the bottom of the main member or side 10 there is a further smallopening 15 to receive a rod which, in

the spark control mechanism.

The top'16 is rectangular and slightly the Chevrolet motor illustrated,ispart of greater in size than the engine bloc. This top member ispreferably flat and hasa great number of oilholes such as 17 preferablythree times the number of valves, that is, for a six cylinder enginethere would be eighteen holes 17 one for oiling the central 1 post ofeach valve, one for the long rod, and one for the connection between thevalve stem and the rocker arms so that any and all places requiringoiling may be readily reached without removal of the cover. In additionto the holes 17 I provide optional holes 18 in case it is desired tosecure the dust cover to the engine bloc by removing one of the boltsfrom the rocker arm cap and by replacing such bolt with a stud 20 whichshould be of such length as to pass through the hole 18. When thesestuds are used a nut 21 should be provided to support the cover frombeneath and the cover is then looked in place on the stud by means of amay not be integral with the; main; front member 29.1 and the rearmember 30. The front member of the dust cover 29.. is. gener. ally inthe form of a flange at right angles to the side 10 and conformsgenerally to the contour of the engine bloc having an. ex; tendedportion 31 to fit the narrower portion of the engine casting.

As best seen in Fig. 1 the main rear flange 301 is of the same depththroughout and is a trifle shorter than the height of the side member10. The member 30may if desired be entirely omitted but the form shown.is preferred in order to strengthen the device as a Whole and to enablethe dust cover to be more snugly held against the engine.

The principle connection between. the dust cover" and the engine isobtained by the binding of the main portion or sidelOof: the dust coverbetween the exhaust port of the. engine and the exhaust manifold: and ingeneral this will be the only connection of any kind between the engineand: the cover although, as previously stated, the holes 18 may beprovided and used as previously described,

In order to prevent dust from seeping through the holes 17 I provide ashutter 36 composed of a plurality of connected slats or covers-37operated as a unit by the handle 38 Working in a slot 39 in the topmember 16 of the dust cover. Byshifting the handle 38 to one side theholes 17 are all uncovered and by moving the shutter to the other endof' the slot 39 all of the holes 17 are. simul taneously closed makingthe dust cover substantially grit tight.

hat I claim is:

1. The combination with an engine having overhead valves, of a coverenclosing said valves to shield same from dirt and grit and extendingover the side of the engine bloc and secured thereto between the exhaustmanifold, and; the exhaust port,

An automobile engine dust cover consisti g f a side Po i n. aving an Opnin therein corresponding in size and shape to the exhaust port andhaving a top member and front and back flanges forn'iing together acover for the sides and top of the engine, said cover being secured onthe engine bloc by the connections holding the exhaust manifold; to theexhaust port.

3. The combination With an engine having overhead: valves, a port insubstantially the vertical center line of the bloc, and a pipecommunicating with said opening and detachablysecured to the bloc, of acover enclosing said valves to shield same from dirt and grit andextending over the side of the engine bloc and secured thereto betweensaid pipe and said bloc,

4'. A; dust cover for an automobile engine consisting of a rectangularside, a rectangular top an l -shaped front and an L-shaped back, saidcover being secured to the engine between the exhaust port and theexhaust manifold.

5. A dust cover for an automobile engine consisting of a rectangularside, a rectangular top, an L-shaped front and an L-shaped back, saidcover being secured to the engine between a detachable pipe and the bodyof the engine bloc. said cover being held in place by the usualconnections securing said pipe to said bloc.

6. A dust shield for an engine having overhead valves and side push rodsconsisting of means to shield the valves from dust and dirt, and amember having an opening therein to aline with the exhaust port opening,said member serving to protect the side rods from dust and dirt, andbeing secured to the engine bloc between the exhaust manifold and theexhaust port.

7. dust shield for the side push rods of an engine consisting of amember having an opening therein to aline with the exhaust port'opening,said member serving to protect the side rods from dust and dirt, andbeing secured to the engine bloc between the exhaust manifold and theexhaust port.

WILLIAM DAVIS.

